Insert modal verbs may or can.
1. You … come in when you have taken off your shoes. 2. Be careful: you … spill the milk. 3. Most children … slide on the ice very well. 4. … you see anything in this darkness? 5. You … go when you have finished your test. 6. … I use your pen? 7. You .. read this book. You know the language well enough. 8. You … take this book, I don’t need it any more. 9. Do you think you … do it? 10. What time is it? – It … be about 6 o’clock, but I am not sure. 11. You … take a horse to the water, but you … not make him drink. 12. Where nothing is, nothing … be had there. 13. Love … neither be bought nor sold; its only price is love. 14. Man … not live by bread alone. 15. You … take control of your schedule. 16. ... you tell me the time, please? 17. No more for me thanks. I ... eat another thing. 18. Who is that outside? It ... be the postman - he has already been here. 19. We loved the cake. ... you give us the recipe for it? 20. My aunt ... tell fortunes from tea leaves.

1)may 2)can 3)can 4)can  5)may 6)can  7)may 8)may 9)can 10) may 11)may, can 12) may ? 13) can 14) can 15) may 16) can 17) can 18) may 19)Can 20)can